Brake calipers are a very important part of your bike which should not be overlooked. Brake calipers feature a spring mechanism which should be kept clean and well adjusted. Brake pads should be regularly checked for wear. Upgrading brake calipers can reduce the weight of your bike, offer lighter operation and improve brake modulation or feel. Merlin stock brake calipers from Shimano, Campagnolo, Sram, Tektro and Magura. Direct Mount calipers will only fit bikes frames with the correct mounts.